* {
    padding: 0;
    margin: 0;
}

#top {
    width: 100%;
    position: fixed;
    top: 0;
    z-index: 5;
}

.nav_top {
    width: 100%;
    height: 20px;
    background: rgb(133, 127, 127);
}

.navigation {
    width: 100%;
    height: 40px;
    position: relative;
}

.nav {
    width: 1000px;
    height: 100%;
    background-color: rgb(184, 178, 178);
    margin: auto;
    z-index: 5;
}

.nav ul li {
    list-style: none;
    float: left;
    width: 20%;
    text-align: center;
    font-size: 22px;
}

.nav ul li a {
    text-decoration: none;
    line-height: 40px;
    color: white;
    /* font-weight: bold; */
    font-family: 微软雅黑;
    display: block;
    /* height: 40px; */
}

.nav li:hover a {
    color: rgb(95, 15, 15);
    background: gray;
}

.nav ul .nav_two {
    background: gray;
    display: none;
}

.nav ul li .nav_two a {
    font-size: 18px;
    color: white;
    height: 35px;
    line-height: 35px;
    z-index: 5;
}

.nav ul li:hover .nav_two {
    display: block;
}

.nav .nav_two a:hover {
    color: rgb(95, 15, 15);
    background: gray;
}

.foot {
    margin-top: 80px;
    height: 150px;
    width: 100%;
    background-color: rgb(34, 33, 33);
    border-top: 2px solid red;
}

.foot_center {
    padding-top: 40px;
    height: 100px;
    width: 800px;
    margin: auto;
}

.foot_center p {
    color: white;
    font-family: 微软雅黑;
}

.foot_center p a {
    color: rgb(219, 58, 58);
}